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Reverse osmosis scale inhibitor and preparation method thereof

A scale inhibitor and reverse osmosis technology, which is applied in the field of reverse osmosis scale inhibitor and its preparation, can solve the problems of increasing wastewater treatment costs, low efficiency of scale inhibitors, and reducing the service life of membranes, etc., to achieve excellent scale inhibition performance, The effect of low operation and maintenance cost and small amount of addition

Pending Publication Date: 2022-03-11
南京开广化工有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] After the long-term operation of the reverse osmosis system, with the accumulation of impurities such as salts, colloids, and microorganisms in the raw water, the water production rate and water quality of the membrane system will decline, affecting the normal operation of the device.
Commonly used antiscalants are not efficient, resulting in frequent acid-base cleaning for the system, which will cause greater damage to the membrane elements, reduce the service life of the membrane, and generate a large amount of acid-base cleaning waste liquid, increasing the cost of wastewater treatment

Method used

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  • Reverse osmosis scale inhibitor and preparation method thereof

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Embodiment 1

[0020] Embodiment 1: a kind of preparation method of reverse osmosis scale inhibitor, described preparation method comprises:

[0021] Picking materials: 150kg of aminotrimethylene phosphoric acid, 150kg of acrylic acid-acrylate sulfonate binary copolymer, 50kg of citric acid, 50kg of propylmethacrylamide, 60kg of sodium bisulfite, and 650kg of tap water;

[0022] Feeding: Inhale tap water into the reactor, keep the temperature at 30°C-40°C, and start stirring;

[0023] Amino trimethylene phosphoric acid is dropped into the reactor;

[0024] Put citric acid into the reactor;

[0025] Suction of acrylic acid-acrylate sulfonate binary copolymer into the reactor;

[0026] After stirring for 3-5 minutes, add propylmethacrylamide and sodium bisulfite to the reaction kettle;

[0027] Continue to stir for 20-40 minutes, mix well;

[0028] Stand still: After standing for 20-40 minutes, cool down to room temperature, and take samples to check to ensure that there is no precipitatio...

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Abstract

The invention discloses a preparation method of a reverse osmosis scale inhibitor. The reverse osmosis scale inhibitor comprises the following raw materials: 10-15 parts of amino trimethylene phosphonic acid, 10-15 parts of an acrylic acid-acrylate sulfonate biopolymer, 3-5 parts of citric acid, 5-8 parts of propyl methacrylamide, 3-6 parts of sodium hydrogen sulfite and 60-70 parts of tap water. The preparation method comprises the following steps: feeding: sucking tap water into a reaction kettle, keeping the temperature at 30-40 DEG C, and starting stirring; adding amino trimethylene phosphonic acid into the reaction kettle; adding citric acid into the reaction kettle; sucking the acrylic acid-acrylate sulfonate binary copolymer into the reaction kettle; after stirring for 3 to 5 minutes, adding propyl methacrylamide and sodium hydrogen sulfite into the reaction kettle; continuously stirring for 20-40 minutes, and uniformly mixing; standing: after standing for 20-40 minutes, cooling to normal temperature, sampling and checking to ensure that no precipitate is separated out; and filtering: after filtering, sub-packaging to obtain a finished product.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a reverse osmosis scale inhibitor and a preparation method thereof. Background technique [0002] After long-term operation of the reverse osmosis system, with the accumulation of impurities such as salts, colloids, and microorganisms in the raw water, the water production rate and water quality of the membrane system will decline, affecting the normal operation of the device. Commonly used antiscalants are not efficient, resulting in frequent acid-base cleaning for the system, which will cause greater damage to the membrane elements, reduce the service life of the membrane, and generate a large amount of acid-base cleaning waste liquid, increasing the cost of wastewater treatment. Contents of the invention [0003] (1) Solved technical problems [0004] Aiming at the deficiencies of the prior art, the present invention aims to provide a reverse osmosis membrane wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D65/08
CPCB01D65/08
Inventor 金玉泉
Owner 南京开广化工有限公司
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